Neuromas are generally benign or non-cancerous growths of nerve tissue, developing in various parts of the body. Morton?s Neuromas are confined to the nerves of the foot, most commonly, between the third and fourth toes. The condition involves a thickening of the tissue around one of the digital nerves leading to the toes and does not qualify as an actual tumor. The affliction causes a sharp, burning pain, usually in the region of the ball of the foot. A patient?s toes may also sting, burn or exhibit numbness. Often, the symptoms have been likened to ?walking on a marble.?
Some experts believe that other foot conditions may also be associated with Morton's neuroma. This is because other conditions may cause the metatarsal bones to rub against the nerve in your foot. Foot problems that may increase your risk of developing Morton's neuroma include abnormally positioned toes, high arches, where the arch or instep of your foot is raised more than normal, flat feet, low arches or no arches at all, bunions a bony swelling at the base of the toe. Hammer toe, where the toe is bent at the middle joint. Being active and playing sport can make the painful symptoms of Morton's neuroma worse. In particular, running or sports that involve running, such as racquet sports, can place extra pressure on the nerve in your foot, which can aggravate the problem.
Symptoms typically include pain, often with pins and needles on one side of a toe and the adjacent side of the next toe. Pain is made worse by forefoot weight bearing and can also be reproduced by squeezing the forefoot to further compress the nerve. Pressing in between the third and forth metatarsals for example with a pen can also trigger symptoms.
To confirm the diagnosis, your doctor will examine your feet. He or she will look for areas of tenderness, swelling, calluses, numbness, muscle weakness and limited motion. To check for a Morton's neuroma, your doctor will squeeze the sides of your foot. Squeezing should compress the neuroma and trigger your typical pain. In some cases, your doctor will find numbness in the webbed area between the affected toes. Pain in two or more locations on one foot, such as between both the second and third toes and the third and fourth toes, more likely indicates that the toe joints are inflamed rather than a Morton' neuroma.
Non Surgical Treatment
Treatments may include rehabilitation measures to reduce nerve Irritation. Switching to low-heeled, wide-toed shoes with good arch support. Wearing padding in the shoes and/or between the toes. Wearing shoe inserts to correct a mechanical abnormality of the foot. Having ultrasound, electrical stimulation, whirlpool, and massage done on the foot. The foot may be injected with corticosteroids mixed with a local anesthetic in order to reduce pain. Relief may be only temporary, however, if the mechanical irritation is not also corrected. Injections with other types of medications such as alcohol, phenol, or vitamin B12 are sometimes used.
Operative treatment of Morton?s neuroma should be entertained only after failure of nonoperative management. Standard operative treatment involves identifying the nerve and cutting (resecting) it proximal to the point where it is irritate/injured. This is usually done through an incision on the top (dorsal) aspect of the foot, although in rare instances, an incision on the sole (plantar) aspect of the foot maybe used. An incision on the sole of the foot works very well, unless an excessive scar forms in which case it can be problematic. Some physicians will attempt to treat Morton?s neuroma by releasing the intermetatarsal ligament and freeing the nerve of local scar tissue. This may also be beneficial.